<template>
	<view>
		<!-- 使用自定义的组件 -->
		<my-search @click="gotoSearch"></my-search>
		<view class="scroll-view-container">
			<scroll-view scroll-y="true" :style="{height:wh+'px'}" class="left-scroll-view">
				<view class="left-scroll-view-item" :class="index === active ?'active':''" v-for="(item,index) in cateList" :key="index" @click="changeItem(index)">{{item.cat_name}}</view>
			</scroll-view>
			<scroll-view scroll-y="true" :style="{height:wh+'px'}" :scroll-top="scrollTop">
				<view class="cate-lv2" v-for="(item,index) in cateLevel2" :key="index">
					<!-- 二级分类的标题 -->
					<view class="cate-lv2-title"> 
						/ {{item.cat_name}} /
					</view>
					
					<!-- 当前二级分类下的三级列表 -->
					<view class="cate-lv3-list">
						<view class="cate-lv3-item" v-for="(item3,i) in item.children" :key="i" @click="gotoGoodsList(item3)">
							<!-- 三级分类的图片 -->
							<image :src="item3.cat_icon"></image>
							<!-- 三级分类的文本 -->
							<text>{{item3.cat_name}}</text>
						</view>
					</view>
				</view>
			</scroll-view>
		</view>
	</view>
</template>

<script>
	//import {mapGetters} from 'vuex'
	import badgeMix from '@/mixins/tabbar-badge.js'
	export default {
		mixins:[badgeMix],
		data() {
			return {
				cateList:[],
				//激活项目
				active:0,
				cateLevel2:[],
				scrollTop:0,
				wh:0
			};
		},
		onLoad(){
			this.getCateList();
			const sysInfo = uni.getSystemInfoSync();
			this.wh = sysInfo.windowHeight - 50;
		},
		//页面显示的时候加载显示
		// onShow() {
		// 	this.setBadge();
		// },
		// computed:{
		// 	//将cart模块的total映射到当前页面的计算属性
		// 	...mapGetters('cart',['total'])
		// },
		methods:{
			//设置tabbar显示
			// setBadge(){
			// 	uni.setTabBarBadge({
			// 		index:2,
			// 		text:this.total+''
			// 	})
			// },
			//去搜索页面
			gotoSearch(){
				uni.navigateTo({
					url:'/subpkg/search/search'
				})
			},
			//点击了三级分类中的某项
			gotoGoodsList(item){
				console.log(item);
				uni.navigateTo({
					url:'/subpkg/good_list/good_list?cid='+item.cat_id
				})
			},
			//选择某个分类
			changeItem(index){
					this.scrollTop = this.scrollTop == 0?1:0;
					this.active = index;
					this.cateLevel2 = this.cateList[index].children
					console.log(this.cateLevel2)
			},
			//获取分类列表的数据
			async getCateList(){
				const {data:res} = await uni.$http.get('/api/public/v1/categories')
				if(res.meta.status !== 200){
					return uni.$showMsg();
				}else{
					this.cateList = res.message;
					this.cateLevel2 = res.message[0].children
				}
			}
		}
	}
</script>

<style lang="scss">
.scroll-view-container{
	display: flex;
	.left-scroll-view{
		width: 120px;
		.left-scroll-view-item{
			background-color: #f7f7f7;
			line-height: 60px;
			text-align: center;
			font-size: 12px;
			&.active{
				background-color: white;
				position: relative;
				&::before{
					content: '';
					display: block;
					width: 3px;
					height: 30px;
					background-color: red;
					position: absolute;
					top:50%;
					left: 0;
					transform: translateY(-50%);
				}
			}
		}
	}
}

.cate-lv2-title{
	font-size: 12px;
	font-weight: bold;
	text-align: center;
	padding: 15px 0;
}
.cate-lv3-list{
	display: flex;
	flex-wrap: wrap;
	.cate-lv3-item{
		width: 33.33%;
		display: flex;
		flex-direction: column;
		justify-content: center;
		align-items: center;
		margin-bottom: 10px;
		image{
			width: 60px;
			height: 60px;
		}
		text{
			font-size: 12px;
		}
	}
}
</style>
